diff --git a/usermods/Si7021_MQTT_HA/Si7021_MQTT_HA.cpp b/usermods/Si7021_MQTT_HA/Si7021_MQTT_HA.cpp
index 44218d596..7845658ad 100644
--- a/usermods/Si7021_MQTT_HA/Si7021_MQTT_HA.cpp
+++ b/usermods/Si7021_MQTT_HA/Si7021_MQTT_HA.cpp
@@ -9,7 +9,7 @@
 #error "This user mod requires MQTT to be enabled."
 #endif
 
-Adafruit_Si7021 si7021;
+static Adafruit_Si7021 si7021;
 
 class Si7021_MQTT_HA : public Usermod
 {
diff --git a/usermods/Si7021_MQTT_HA/library.json b/usermods/Si7021_MQTT_HA/library.json
index 7b9ac4d77..5d7aa300a 100644
--- a/usermods/Si7021_MQTT_HA/library.json
+++ b/usermods/Si7021_MQTT_HA/library.json
@@ -1,6 +1,7 @@
 {
   "name:": "Si7021_MQTT_HA",
   "dependencies": {
-    "finitespace/BME280":"3.0.0"
+    "finitespace/BME280":"3.0.0",
+    "adafruit/Adafruit Si7021 Library" : "1.5.3"
   }
 }
\ No newline at end of file
diff --git a/usermods/sensors_to_mqtt/sensors_to_mqtt.cpp b/usermods/sensors_to_mqtt/sensors_to_mqtt.cpp
index 343fd08b6..5f7da97a9 100644
--- a/usermods/sensors_to_mqtt/sensors_to_mqtt.cpp
+++ b/usermods/sensors_to_mqtt/sensors_to_mqtt.cpp
@@ -9,9 +9,9 @@
 #error "This user mod requires MQTT to be enabled."
 #endif
 
-Adafruit_BMP280 bmp;
-Adafruit_Si7021 si7021;
-Adafruit_CCS811 ccs811;
+static Adafruit_BMP280 bmp;
+static Adafruit_Si7021 si7021;
+static Adafruit_CCS811 ccs811;
 
 class UserMod_SensorsToMQTT : public Usermod
 {